Hm let's see the answer should be by the definition of isosceles triangle
Ans:
Not rational number include √2, π, e, and φ. The decimal expansion of an irrational number.
X - 3 = 7.....add 3 to both sides
x = 7 + 3
x = 10
addition property of equality because we added 3 to both sides
If you have the diameter and you want to find the radius, just remember that the diameter is <u>half</u> of a circle (circumference) and the radius is a <u>quarter</u> of a circle, and it can also be found by dividing the diameter by 2, because the radius is half of a diameter.
<em>I hope this clears your confusion!</em>
9). The river is 80 meters wide. That is, the distance from shore to shore as measured straight across the river is 80 meters. The time to cross this 80 meters wide river can be determined by rearranging and substituting into the average speed equation.
Time = distance/(ave.speed)
The distance of the 80 m can be substituted into the numerator; but what about the denominator. What value should be used for average speed?
time = (80 m)/(4 m/s) = 20 s it requires 20 s for the boat to travel across the river. During this 20 s the boat also drifts downstream.
What distance downstream?
distance = ave.speed * time = (3 m/s) * (20 s)
distance = 60 m The boat is carried 60 meters downstream during 20 seconds it takes to cross the river.
Resultant Velocity can be performed using the Pythagorean Theorem.
10).